<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>

		<style type="text/css">
			div {
				width: 200px;
				height: 200px;

			}

			div:nth-child(1) {
				background-color: rgba(100%,100%,100%,.75);
				border: solid 2px #0000FF;
				/* float: left; */

			}

			div:nth-child(2) {
				float: left;
				border: solid 1px green;
				background-color: #008000;

			}
		</style>
	</head>
	<body>
		
		<!-- 
		 float 浮动 
		 
		 浮动后 会影响 后面的元素 ，前面的元素不会受到影响的。
		 
		 https://doc.houdunren.com/css/8%20%E6%B5%AE%E5%8A%A8%E5%B8%83%E5%B1%80.html#%E4%B8%A2%E5%A4%B1%E7%A9%BA%E9%97%B4
		 
		 
		 -->


		<div></div>
		<div></div>
	</body>
</html>
